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A Conductometric Sensor Specific for Cationic Surfactants
Author(s) -
Hnaien Mouna,
Dzyadevych Sergei,
Lagarde Florence,
JaffrezicRenault Nicole
Publication year - 2012
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200055
Subject(s) - sodium tetraphenylborate , cationic polymerization , conductometry , tetraphenylborate , pulmonary surfactant , plasticizer , chemistry , membrane , analytical chemistry (journal) , electrode , inorganic chemistry , materials science , chromatography , polymer chemistry , organic chemistry , ion , biochemistry
In this work, a fast, sensitive and miniaturised conductometric sensor based on interdigitated electrodes, working in differential mode, was developed for the determination of cationic surfactants. The membrane was composed of a polymer (PVC), a plasticizer (dinonylphtalate (DNP)) and a carrier (sodium tetraphenylborate (NaBΦ 4 )). The sensor response was linear from at least 10 −9 M to 10 −2 M for dodecyltrimethylammonium (DTA + ). No significant loss of sensor response was observed after 8 weeks. The sensor exhibited a lower sensitivity and a narrower dynamic range for tetrabutylammonium, decyltrimethylammonium and cetyltrimethylammonium cationic surfactants. A ten times lower sensitivity was observed for laurylsulfate anionic surfactant, (LS − ).